:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --accent: #06b6d4;
    --success: #16a34a;
    --success-bg: #dcfce7;
    --warning: #d97706;
    --warning-bg: #fef3c7;
    --danger: #dc2626;
    --danger-bg: #fee2e2;
    --bg: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-muted: #64748b;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .06);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* ---------- Topbar publique ---------- */
.public-nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
}
.public-nav .container { display: flex; align-items: center; justify-content: space-between; position: relative; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.6rem; line-height: 1; cursor: pointer; color: var(--text); padding: 4px 8px; }
.brand, .brand:hover { font-size: 1.3rem; font-weight: 800; color: var(--primary); display: flex; align-items: center; gap: 8px; text-decoration: none; }
.brand .logo-icon { width: 30px; height: 30px; flex-shrink: 0; }
.sidebar .brand .logo-icon { width: 26px; height: 26px; }

.ui-icon { width: 18px; height: 18px; flex-shrink: 0; }
.sidebar a .ui-icon { width: 17px; height: 17px; opacity: .85; }
.notice-banner .ui-icon { width: 16px; height: 16px; vertical-align: -3px; margin-right: 2px; }
.feature-card .icon .ui-icon { width: 28px; height: 28px; color: var(--primary); }
.payment-badge .ui-icon { width: 16px; height: 16px; }
.gateway-option .ui-icon { width: 22px; height: 22px; color: var(--primary); }
.btn .ui-icon { width: 16px; height: 16px; vertical-align: -3px; margin-right: 2px; }
label .ui-icon { width: 15px; height: 15px; vertical-align: -3px; margin-right: 2px; }
.public-nav nav a { margin-left: 20px; font-weight: 600; color: var(--text); }
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: var(--radius);
    border: none;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    font-size: .95rem;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background: var(--primary-light); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #b91c1c; }
.btn-success { background: var(--success); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: .85rem; }

/* ---------- Hero ---------- */
.hero { padding: 80px 0; text-align: center; }
.hero h1 { font-size: 2.6rem; margin-bottom: 16px; }
.hero p { color: var(--text-muted); font-size: 1.1rem; max-width: 600px; margin: 0 auto 28px; }
.hero .actions { display: flex; gap: 14px; justify-content: center; }

.features { padding: 60px 0; background: var(--surface); }
.features .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.feature-card { padding: 24px; border: 1px solid var(--border); border-radius: var(--radius); }
.feature-card .icon { margin-bottom: 10px; }

.faq-section { padding: 60px 0; }
.faq-section h2 { text-align: center; font-size: 1.8rem; margin-bottom: 32px; }
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; margin-bottom: 12px; background: var(--surface); }
.faq-item summary { font-weight: 600; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before { content: '+'; display: inline-block; width: 18px; color: var(--primary); font-weight: 800; }
.faq-item[open] summary::before { content: '−'; }
.faq-item p { margin: 12px 0 0 18px; color: var(--text-muted); }

/* ---------- Auth pages ---------- */
.auth-wrap { display: flex; min-height: 100vh; align-items: center; justify-content: center; padding: 40px 16px; }
.auth-card { background: var(--surface); border-radius: 16px; box-shadow: var(--shadow); padding: 36px; width: 100%; max-width: 480px; }
.auth-card.wide { max-width: 640px; }
.auth-card h1 { font-size: 1.5rem; margin-top: 0; }
.auth-card .subtitle { color: var(--text-muted); margin-bottom: 24px; font-size: .9rem; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .88rem; }
.form-group .hint { color: var(--text-muted); font-size: .78rem; margin-top: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
input[type=text], input[type=email], input[type=password], input[type=tel], input[type=number], input[type=file], select, textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: .95rem;
    font-family: inherit;
    background: #fff;
    color: var(--text);
}
textarea { resize: vertical; min-height: 100px; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary-light); border-color: var(--primary); }

.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 18px; font-size: .9rem; }
.alert-error { background: var(--danger-bg); color: #991b1b; }
.alert-success { background: var(--success-bg); color: #166534; }
.alert-warning { background: var(--warning-bg); color: #92400e; }
.alert-info { background: var(--primary-light); color: #1e40af; }

/* ---------- App shell (dashboard) ---------- */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
    width: 230px;
    background: #0f172a;
    color: #cbd5e1;
    padding: 24px 0;
    flex-shrink: 0;
}
.sidebar .brand { color: #fff; padding: 0 20px 20px; font-size: 1.15rem; }
.sidebar a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: #cbd5e1;
    font-size: .9rem;
    font-weight: 500;
}
.sidebar a:hover, .sidebar a.active { background: #1e293b; color: #fff; text-decoration: none; }
.sidebar .section-label { padding: 16px 20px 6px; font-size: .7rem; text-transform: uppercase; color: #64748b; letter-spacing: .05em; }

.main-content { flex: 1; min-width: 0; }
.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 14px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.topbar .balance { font-weight: 700; color: var(--primary); }
.page { padding: 28px; }
.page h1 { margin-top: 0; font-size: 1.5rem; }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}
.card h2 { font-size: 1.1rem; margin-top: 0; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; }
.stat-card .label { font-size: .8rem; color: var(--text-muted); margin-bottom: 6px; }
.stat-card .value { font-size: 1.6rem; font-weight: 700; }

table { width: 100%; border-collapse: collapse; font-size: .88rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 600; font-size: .78rem; text-transform: uppercase; }
tr:hover td { background: #f8fafc; }
.table-wrap { overflow-x: auto; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: .75rem; font-weight: 600; vertical-align: middle; }
.badge-active, .badge-completed, .badge-sent, .badge-approved { background: var(--success-bg); color: #166534; }
.badge-pending, .badge-pending_approval, .badge-pending_payment { background: var(--warning-bg); color: #92400e; }
.badge-suspended, .badge-rejected, .badge-failed, .badge-cancelled { background: var(--danger-bg); color: #991b1b; }
.badge-admin { background: var(--primary-light); color: #1e40af; }

.notice-banner {
    background: var(--warning-bg);
    color: #92400e;
    padding: 14px 28px;
    font-size: .9rem;
    font-weight: 500;
    border-bottom: 1px solid #fde68a;
}

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tabs a { padding: 10px 16px; font-weight: 600; font-size: .88rem; color: var(--text-muted); border-bottom: 2px solid transparent; }
.tabs a.active { color: var(--primary); border-color: var(--primary); }

.doc-preview img { max-width: 100%; border-radius: 8px; border: 1px solid var(--border); }
.gateway-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.gateway-option { border: 2px solid var(--border); border-radius: var(--radius); padding: 18px; cursor: pointer; text-align: center; }
.gateway-option.selected { border-color: var(--primary); background: var(--primary-light); }
.gateway-option input { display: none; }

.footer-note { text-align: center; color: var(--text-muted); font-size: .82rem; margin-top: 18px; }

.legal-page { max-width: 760px; margin: 0 auto; padding: 48px 20px 64px; line-height: 1.65; }
.legal-page h1 { font-size: 1.8rem; margin-bottom: 6px; }
.legal-page .updated-at { color: var(--text-muted); font-size: .85rem; margin-bottom: 32px; }
.legal-page h2 { font-size: 1.15rem; margin-top: 32px; margin-bottom: 10px; }
.legal-page p, .legal-page li { color: var(--text); font-size: .95rem; }
.legal-page ul { padding-left: 20px; margin-bottom: 16px; }
.legal-page li { margin-bottom: 6px; }

.site-footer { padding: 32px 0 40px; border-top: 1px solid var(--border); background: var(--surface); }
.footer-links { text-align: center; font-size: .82rem; color: var(--text-muted); margin: 16px 0 4px; }
.footer-links a { color: var(--text-muted); }
.footer-links span { margin: 0 8px; }
.payment-badges { display: flex; justify-content: center; align-items: center; gap: 12px; flex-wrap: wrap; }
.payment-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: .85rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg);
}

@media (max-width: 768px) {
    .app-shell { flex-direction: column; }
    .sidebar { width: 100%; padding: 12px 0; }
    .form-row { grid-template-columns: 1fr; }

    .nav-toggle { display: block; }
    .public-nav nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface);
        border: 1px solid var(--border);
        border-top: none;
        flex-direction: column;
        padding: 4px 20px 12px;
        z-index: 20;
    }
    .public-nav nav.open { display: flex; }
    .public-nav nav a { margin-left: 0; padding: 12px 0; border-top: 1px solid var(--border); }
    .public-nav nav a:first-child { border-top: none; }
    .public-nav nav .btn { display: inline-block; margin-top: 8px; }
}